Fendt 04.1.EF – A050 - ECU, basic control unit: A050 - ECU, basic control unit Turbo-clutch characteristic

The fault indicates "No calibration or drifted, changed values" for the turbo-clutch characteristic. The ECU has lost the learned engagement parameters for the turbo-clutch function, or the stored values have drifted outside of the acceptable operational range.

• 309 Vario COM III
• 310 Vario COM III
• 311 Vario COM III
• 312 Vario COM III
• 922 Vario COM III
• 924 Vario COM III
• 927 Vario COM III
• 930 Vario COM III
• 933 Vario COM III
• 936 Vario COM III
• 207 Vario
• 208 Vario
• 209 Vario
• 210 Vario
• 211 Vario
• 409 Vario COM III
• 410 Vario COM III
• 411 Vario COM III
• 412 Vario COM III
• 711 Vario COM III
• 712 Vario COM III
• 714 Vario COM III
• 716 Vario COM III
• 815 Vario COM III
• 817 Vario COM III
• 818 Vario COM III
• 916 Vario COM III
• 920 Vario COM III
• 926 Vario COM III

1. 1

   Check for related fault code 04.1.64, which indicates a physical actuation fault, PWM supply failure, or blown fuse (F56) for the Y004 - Neutral/Turbo-clutch solenoid valve.

2. 2

   Verify the Y004 solenoid valve wiring harness is intact and that it is receiving a PWM signal from the A050 ECU.

3. 3

   Check transmission oil temperature to ensure it is up to normal operating temperature, as cold, thick oil can skew calibration characteristics.

1. 1

   Pull the handbrake tight

   Caution: The tractor may start moving during this calibration.

2. 2

   Start the engine

3. 3

   Ensure the tractor is completely stationary

   Speed must be less than 0.1 km/h.

4. 4

   Set the engine speed

   Set to 1100 +/- 40 rpm using the hand throttle. Note: The engine speed may drop during the calibration process as the clutch engages.

5. 5

   Access the diagnostic/calibration menu

   Access the tractor's diagnostic/calibration menu on the terminal.

6. 6

   Enter calibration code

   Enter calibration code 4009.

7. 7

   Execute the calibration

   Follow the on-screen prompts to execute the calibration. The A050 ECU will automatically modulate the Y004 solenoid valve to learn the engagement point.

8. 8

   Verify calibration success

   If the calibration completes successfully, the new sensor settings are stored, and the fault code will move to historic/inactive status. If the calibration fails, you likely have a mechanical issue with the transmission high-pressure circuit or a failed Y004 solenoid valve.